Sustained North Atlantic warming drove anomalously intense MIS 11c interglacial

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書誌事項

公開日
2024-07-15
資源種別
journal article
権利情報
  • https://creativecommons.org/licenses/by/4.0
  • https://creativecommons.org/licenses/by/4.0
DOI
  • 10.1038/s41467-024-50207-1
  • 10.5445/ir/1000172575
公開者
Springer Science and Business Media LLC

説明

<jats:title>Abstract</jats:title><jats:p>The Marine Isotope Stage (MIS) 11c interglacial and its preceding glacial termination represent an enigmatically intense climate response to relatively weak insolation forcing. So far, a lack of radiometric age control has confounded a detailed assessment of the insolation-climate relationship during this period. Here, we present <jats:sup>230</jats:sup>Th-dated speleothem proxy data from northern Italy and compare them with palaeoclimate records from the North Atlantic region. We find that interglacial conditions started in subtropical to middle latitudes at 423.1 ± 1.3 thousand years (kyr) before present, during a first weak insolation maximum, whereas northern high latitudes remained glaciated (sea level ~ 40 m below present). Some 14.5 ± 2.8 kyr after this early subtropical onset, peak interglacial conditions were reached globally, with sea level 6–13 m above present, despite weak insolation forcing. We attribute this remarkably intense climate response to an exceptionally long (~15 kyr) episode of intense poleward heat flux transport prior to the MIS 11c optimum.</jats:p>

収録刊行物

  • Nature Communications

    Nature Communications 15 (1), 5933-, 2024-07-15

    Springer Science and Business Media LLC

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